Although there are multiple indications that alcohol alters many physiological brain functions, including cerebral blood flow (CBF), investigations have yet to evaluate how CBF changes after alcohol relate to subsets of subjects with elevated alcoholism risks, such as those with lower levels of response (LR) to alcohol – or how varying risks for alcohol use disorders (AUD) increase with a decreased CBF.
A study by the Journal of Alzheimer’s Disease shows that smoking cannabis causes the brain to age by almost three years. Weed was found to age the brain by 2.8 years, making it worse for the mind than both bipolar disorder or attention deficit hyperactivity disorder. The result turned out to be even worse for schizophrenics, as their brains were found to age by an average of four year. For the study, researchers analyzed blood flow through 128 regions of the brain to determine how old they thought the individual was. Then they checked to see the chronological age of the person to be able to come to a conclusion on what was the effect that weed had on their brain, and how much it had aged. Speaking about the findings, lead study author Dr. Daniel Amen, warned against increased use of marijuana. “The cannabis abuse finding was especially important, as our culture is starting to see marijuana as an innocuous substance,” he said. “This study should give us pause about it.”
Can smoking cannabis have positive effects on the brain? at least when it comes to feeling depressed and suicidal. A 2012 study from the Institute for the Study of Labor suggests that the passage of a medical marijuana law is associated with an almost 5% reduction in suicide rates – an 11% reduction in the suicide rate of age 20-29 males and a 9% reduction in the suicide rate of 30-39 males.
When it comes to side-effects, particularly in leading to fatalities, studies show it would take about 800 joints to kill someone, but it takes a fraction of that alcohol amount to kill a person.